Derek Martinus, an influential figure in British television and theatre, is best remembered for his contributions to iconic series like Doctor Who. His tenure on the show produced classic serials such as "The Tenth Planet" (1966) and "Spearhead from Space" (1970), the latter being a significant milestone as it marked the series' transition to color. Collectors of Doctor Who memorabilia often seek out Martinus's episodes due to their pivotal role in the show's history, particularly for fans of the early Doctor incarnations. Beyond Doctor Who, Martinus directed the acclaimed children's drama The Paper Lads (1977), which won a Pye Award, and he also left his mark on the sci-fi genre with the series Blake's 7. His unique ability to blend theatrical elements with television storytelling makes his works highly collectible, especially the 1984 film Vargen, a standout piece in his filmography. Collectors appreciate his diverse range and the historical significance of his projects, cementing his legacy in the realm of physical media.